CN104197024A - Peristaltic pumping circulation cooling type magnetic liquid sealing device - Google Patents
Peristaltic pumping circulation cooling type magnetic liquid sealing device Download PDFInfo
- Publication number
- CN104197024A CN104197024A CN201410384157.9A CN201410384157A CN104197024A CN 104197024 A CN104197024 A CN 104197024A CN 201410384157 A CN201410384157 A CN 201410384157A CN 104197024 A CN104197024 A CN 104197024A
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- pole shoe
- seal ring
- peristaltic pump
- pipeline
- magnetic liquid
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Abstract
The invention discloses a peristaltic pumping circulation cooling type magnetic liquid sealing device and belongs to the field of sealing of mechanical engineering. The peristaltic pumping circulation cooling type magnetic liquid sealing device successively solves the problem that because the heating amount of magnetic liquid in a sealing gap is large when linear speed of an existing magnetic liquid sealing device is higher than 20m/s, service life is shortened, and the magnetic liquid sealing device even loses efficacy. The device is composed of a magnetic liquid sealing assembly, a peristaltic pump, a cooling system and a peristaltic pump pipeline in a combined mode. Magnetic liquid below each pole tooth of the device circulates outside through the peristaltic pump, not only is the pressure resistance capacity of the magnetic liquid sealing device not influenced, but also the cooling efficiency becomes maximum because the magnetic liquid is directly pumped to the outside to be cooled, and the magnetic liquid below each pole tooth can be fully cooled.
Description
Technical field
The invention belongs to sealing field of mechanical engineering.
Background technique
Magnetic fluid sealing is applied in the sealed environment of major diameter, high linear speed, and the magnetic liquid in seal clearance often lost efficacy because of excess Temperature, and in the world, the cooling of major diameter, high linear speed operating mode magnetic hydraulic seal is also a difficult problem always.Therefore the improvement of the cooling-cycle device to magnetic fluid sealing is most important with research and development, directly affects the working life of magnetic fluid seal device.
The present type of cooling the most widely has the type of cooling of process water cold trap in pole shoe, as described in documents 1 (publication number is the patent of CN 103574041A); There is the type of cooling that water jacket is installed at pole shoe excircle, as described in documents 2 (publication number is the patent of CN 200943707Y); Have and heat-conducting property good metal is installed in pole shoe both sides is carried out cooling mode, device as described in 524 pages of documents 3 " magnetic liquid theoretical and application "; Utilize in addition the self cooling mode of the blade rotation on shell, as described in documents 4 (patent No. is the patent of US 7338049B2).But all there is the problem that cooling effect is poor, heat dissipation potential is low in the cooling unit described in above document.
Seal arrangement as described in documents 1 (publication number is the patent of CN 103574041A), its cooling bath is processed in pole shoe, this device has three place's shortcomings: first, thereby reduce magnetic liquid voltage endurance capability in order not affect magnetic circuit distribution, cooling bath is conventionally far away apart from seal clearance, and heat conduction path is larger, and radiating efficiency is low, when linear velocity is during higher than 20m/s, its cooling effect will significantly reduce; The second, if in order to improve radiating efficiency, and the distance of dwindling cooling bath and seal clearance, sealing voltage endurance capability will significantly reduce, and does not possess practicability; The 3rd, cooling bath leaves in pole shoe, and the material of pole shoe is generally magnetic conductive metal, is generally stainless steel material, and thermal conductivity ratio gold, silver, copper and the aluminium of steel are much lower, and therefore heat-conducting effect is limited.
The seal arrangement that documents 2 (publication number is the patent of CN 200943707Y) is described, its cooling principle is identical with documents 1, but its cooling effect is even not as good as the seal arrangement described in documents 1.
Seal arrangement described in documents 3 is installed the good slug of heat-conducting property in pole shoe both sides, its heat-conductive characteristic obviously improves, but do not there is circulating cooling system, in the long playing situation of seal arrangement, its cooling effect is not good, when linear velocity is higher than 20m/s, after stream time exceedes 5h, its cooling effect will significantly decline; Secondly, this Heat Conduction Material is arranged on pole shoe side, cannot carry out the magnetic liquid in the seal clearance near magnet place coolingly, in the time that linear velocity is higher, magnetic liquid herein is early lost efficacy, and causes sealing voltage endurance capability and reduces even and lost efficacy.
The seal arrangement that documents 4 (patent No. is the patent of US 7338049B2) is described, its heat conduction that utilizes Sealing self to rotate to increase with ambient gas is carried out cooling, because ambient gas temperature is uncontrollable, heat conduction path is very long, therefore cooling effect is very limited, can only be applicable to the working environment that linear velocity is lower, the diameter of axle is less, not there is practicability.
Summary of the invention
The technical issues that need to address of the present invention are, when existing magnetic liquid rotating sealing device is worked under the environment of major diameter, high linear speed, because magnetic liquid heating value in seal clearance is large, easily to cause sealing shortening even working life and lost efficacy.Therefore a kind of wriggling pumping circulating cooling type magnetic fluid seal device is provided.
The technical solution adopted for the present invention to solve the technical problems is:
Wriggling pumping circulating cooling type magnetic fluid seal device, forms this device and comprises:
Rotating shaft, shell, left side seal ring, left pole shoe the first seal ring, left pole shoe the second seal ring, left pole shoe the 3rd seal ring, permanent magnet, right pole shoe the 4th seal ring, right pole shoe the 3rd seal ring, right pole shoe the second seal ring, right pole shoe the first seal ring, end cap, magnetic liquid, peristaltic pump the 8th pipeline, peristaltic pump the 7th pipeline, peristaltic pump the 6th pipeline, peristaltic pump the 5th pipeline, right pole shoe, left pole shoe, peristaltic pump the 4th pipeline, peristaltic pump the 3rd pipeline, peristaltic pump second pipe, peristaltic pump the first pipeline,
Form the connection between the each several part of this device:
Described left pole shoe the first seal ring, left pole shoe the second seal ring and left pole shoe the 3rd seal ring are arranged in the groove on left pole shoe cylindrical, the left pole shoe of formation with seal ring, right pole shoe the first seal ring, right pole shoe the second seal ring, right pole shoe the 3rd seal ring and right pole shoe the 4th seal ring are arranged in the groove on right pole shoe cylindrical, form the right pole shoe with seal ring;
Left side seal ring is arranged in the seal groove of shell boss inner side, by the left pole shoe with seal ring, permanent magnet, pack in shell endoporus with the right pole shoe order of seal ring; By being fixedly connected with, end cap and shell are fixed, made the each part axial of enclosure location; Left pole shoe with seal ring, permanent magnet, the right pole shoe with seal ring, end cap are inserted in to rotating shaft together with shell, by being threaded shell axially locating on shell flange plate; To, in assembling process, after permanent magnet is installed, in the endoporus of permanent magnet, inject magnetic liquid;
After filling magnetic liquid, peristaltic pump the first pipeline, peristaltic pump second pipe, peristaltic pump the 3rd pipeline, peristaltic pump the 4th pipeline, peristaltic pump the 5th pipeline, peristaltic pump the 6th pipeline, peristaltic pump the 7th pipeline and peristaltic pump the 8th pipe interior respectively each pipe ends is packed in the through hole that left pole shoe and right pole shoe liquid inlet and outlet hole and shell form;
It is characterized in that:
By peristaltic pump, the magnetic liquid under each utmost point tooth is extracted out from liquid outlet opening b, carried out coolingly in seal arrangement outside through cooling system, cooling magnetic liquid is sent into utmost point tooth below from inlet opening a, carry out circulating cooling;
Each utmost point tooth right side of left pole shoe is all processed with an inlet opening a and a liquid outlet opening b, and inlet opening and liquid outlet opening are 180 ° of distributions;
Each utmost point tooth left side of right pole shoe is all processed with an inlet opening a and a liquid outlet opening b, and inlet opening and liquid outlet opening are 180 ° of distributions;
Shell is processed with feed pathway and liquid outlet channel in the position of correspondence each utmost point tooth inlet opening and liquid outlet opening;
The first to the 8th pipe ends of peristaltic pump is arranged on respectively in the through hole of shell and pole shoe formation, and pipeline opening is alignd with utmost point tooth;
The present invention compares had beneficial effect with prior art:
In the time that magnetic fluid seal device is worked, magnetic liquid is expressed to peristaltic pump tube road junction place by external pressure, directly contact with pipeline opening, therefore the magnetic liquid under each utmost point tooth can be extracted out from liquid outlet b by peristaltic pump, in the cooling system of magnetic fluid seal device outside, carry out coolingly, then flow into utmost point tooth from liquid entering hole a.Because peristaltic pump has selfsealings performance, not only do not affect the voltage endurance capability of magnetic fluid seal device, and carry out cooling because magnetic liquid is directly pumped to outside, it is maximum that cooling effectiveness reaches, magnetic liquid under each utmost point tooth all obtains cooling fully, thereby successfully solved existing magnetic fluid seal device on-line velocity 20m/s when above, magnetic liquid heating value is large in seal clearance, shorten the problem even losing efficacy working life.
Brief description of the drawings
Fig. 1 pumping circulating cooling type magnetic fluid seal device of wriggling;
Fig. 2 pumping circulating cooling type magnetic fluid seal device cool cycles schematic diagram of wriggling.
In Fig. 1: rotating shaft (1), shell (2), left side seal ring (3), left pole shoe the first seal ring (4), left pole shoe the second seal ring (5), left pole shoe the 3rd seal ring (6), permanent magnet (7), right pole shoe the 4th seal ring (8), right pole shoe the 3rd seal ring (9), right pole shoe the second seal ring (10), right pole shoe the first seal ring (11), end cap (12), magnetic liquid (13), peristaltic pump the 8th pipeline (14), peristaltic pump the 7th pipeline (15), peristaltic pump the 6th pipeline (16), peristaltic pump the 5th pipeline (17), right pole shoe (18), left pole shoe (19), peristaltic pump the 4th pipeline (20), peristaltic pump the 3rd pipeline (21), peristaltic pump second pipe (22), peristaltic pump the first pipeline (23).
Embodiment
Taking accompanying drawing as embodiment, the invention will be further described:
Wriggling pumping circulating cooling type magnetic fluid seal device, as Fig. 1, sealing device comprises: rotating shaft 1, shell 2, left side seal ring 3, left pole shoe the first seal ring 4, left pole shoe the second seal ring 5, left pole shoe the 3rd seal ring 6, permanent magnet 7, right pole shoe the 4th seal ring 8, right pole shoe the 3rd seal ring 9, right pole shoe the second seal ring 10, right pole shoe the first seal ring 11, end cap 12, magnetic liquid 13, peristaltic pump the 8th pipeline 14, peristaltic pump the 7th pipeline 15, peristaltic pump the 6th pipeline 16, peristaltic pump the 5th pipeline 17, right pole shoe 18, left pole shoe 19, peristaltic pump the 4th pipeline 20, peristaltic pump the 3rd pipeline 21, peristaltic pump second pipe 22, peristaltic pump the first pipeline 23,
Form the connection between the each several part of this device:
Described left pole shoe the first seal ring 4, left pole shoe the second seal ring 5 and left pole shoe the 3rd seal ring 6 are arranged in the groove on left pole shoe 19 cylindricals, the left pole shoe of formation with seal ring, right pole shoe the first seal ring 11, right pole shoe the second seal ring 10, right pole shoe the 3rd seal ring 9 and right pole shoe the 4th seal ring 8 are arranged in the groove on right pole shoe 18 cylindricals, form the right pole shoe with seal ring;
Left side seal ring 3 is arranged in the seal groove of shell 2 boss inner sides, by the left pole shoe with seal ring, permanent magnet 7, pack in shell 2 endoporus with the right pole shoe order of seal ring; Fixing with shell 2 by being fixedly connected with end cap 12, make the each part axial of enclosure location; Left pole shoe with seal ring, permanent magnet 7, the right pole shoe with seal ring, end cap 12 are inserted in to rotating shaft 1 together with shell 2, by being threaded shell 2 axially locating on shell 2 flange plate; To, in assembling process, after permanent magnet 7 is installed, in the endoporus of permanent magnet 7, inject magnetic liquid 13;
After filling magnetic liquid, peristaltic pump the first pipeline 23, peristaltic pump second pipe 22, peristaltic pump the 3rd pipeline 21, peristaltic pump the 4th pipeline 20, peristaltic pump the 5th pipeline 17, peristaltic pump the 6th pipeline 16, peristaltic pump the 7th pipeline 15 and peristaltic pump the 8th pipeline 14 inside respectively each pipe ends is packed in the through hole that left pole shoe 19 and right pole shoe 18 liquid inlet and outlet holes and shell 2 form;
Pass through external peristaltic pump, magnetic liquid in seal clearance flows out magnetic fluid seal device from liquid outlet opening b, enter in external refrigeration system, carry out cooling, magnetic liquid after cooling is under the effect of peristaltic pump, flow into seal clearance from inlet opening a, reach the object of cool cycles, sealing device circulating line quantity is identical with utmost point number of teeth amount, between each pipeline, nothing is interfered mutually, without any leakage.
Taking first utmost point tooth of left pole shoe 19 as example, high-temperature magnetic liquid under this utmost point tooth flows out magnetic fluid seal device from liquid outlet opening b-1, enter in external refrigeration system, carry out cooling, cryomagnetism liquid after cooling is under the effect of peristaltic pump, flow into this utmost point tooth from inlet opening a-1, reach the object of cool cycles.
The quantity of peristaltic pump can determine according to number of channels, both can adopt the form of multichannel list pump, also can adopt the form of single channel list pump.
The material that magnetic property is good is selected in left and right pole shoe, rotating shaft 1, as electrical pure iron;
Permanent magnet 7 is selected rubidium iron boron;
The kind of magnetic liquid is according to the magnetic liquid of the different base fluids of the different choice of sealing gas.
Claims (4)
1. wriggling pumping circulating cooling type magnetic fluid seal device, forms this device and comprises:
Rotating shaft (1), shell (2), left side seal ring (3), left pole shoe the first seal ring (4), left pole shoe the second seal ring (5), left pole shoe the 3rd seal ring (6), permanent magnet (7), right pole shoe the 4th seal ring (8), right pole shoe the 3rd seal ring (9), right pole shoe the second seal ring (10), right pole shoe the first seal ring (11), end cap (12), magnetic liquid (13), peristaltic pump the 8th pipeline (14), peristaltic pump the 7th pipeline (15), peristaltic pump the 6th pipeline (16), peristaltic pump the 5th pipeline (17), right pole shoe (18), left pole shoe (19), peristaltic pump the 4th pipeline (20), peristaltic pump the 3rd pipeline (21), peristaltic pump second pipe (22), peristaltic pump the first pipeline (23),
Form the connection between the each several part of this device:
Described left pole shoe the first seal ring (4), left pole shoe the second seal ring (5) and left pole shoe the 3rd seal ring (6) are arranged in the groove on left pole shoe (19) cylindrical, the left pole shoe of formation with seal ring, right pole shoe the first seal ring (11), right pole shoe the second seal ring (10), right pole shoe the 3rd seal ring (9) and right pole shoe the 4th seal ring (8) are arranged in the groove on right pole shoe (18) cylindrical, form the right pole shoe with seal ring;
Left side seal ring (3) is arranged in the seal groove of shell (2) boss inner side, by the left pole shoe with seal ring, permanent magnet (7), pack in shell (2) endoporus with the right pole shoe order of seal ring; By being fixedly connected with fixing to end cap (12) and shell (2), make the each part axial of enclosure location; Left pole shoe with seal ring, permanent magnet (7), the right pole shoe with seal ring, end cap (12) are inserted in to rotating shaft (1) together with shell (2), by being threaded shell (2) axially locating on shell (2) flange plate; To, in assembling process, permanent magnet (7) be installed afterwards, in the endoporus of permanent magnet (7), inject magnetic liquid (13);
At peristaltic pump the first pipeline (23), peristaltic pump second pipe (22), peristaltic pump the 3rd pipeline (21), peristaltic pump the 4th pipeline (20), peristaltic pump the 5th pipeline (17), peristaltic pump the 6th pipeline (16), peristaltic pump the 7th pipeline (15) and peristaltic pump the 8th pipeline (14) inside are filled and are packed each pipe ends into left pole shoe (19) respectively after magnetic liquid and right pole shoe (18) enters, in the through hole that liquid outlet opening and shell (2) form,
It is characterized in that:
By peristaltic pump, the magnetic liquid under each utmost point tooth is extracted out from liquid outlet opening b, carried out coolingly in seal arrangement outside through cooling system, cooling magnetic liquid is sent into utmost point tooth below from inlet opening a, carry out circulating cooling.
2. the pumping circulating cooling type magnetic fluid seal device of wriggling according to claim 1, is characterized in that:
Each utmost point tooth right side of left pole shoe (19) is all processed with an inlet opening a and a liquid outlet opening b, and inlet opening and liquid outlet opening are 180 ° of distributions;
Each utmost point tooth left side of right pole shoe (18) is all processed with an inlet opening a and a liquid outlet opening b, and inlet opening and liquid outlet opening are 180 ° of distributions;
Shell (2) is processed with feed pathway and liquid outlet channel in the position of correspondence each utmost point tooth inlet opening and liquid outlet opening.
3. the pumping circulating cooling type magnetic fluid seal device of wriggling according to claim 1, is characterized in that:
The first to the 8th pipe ends of peristaltic pump is arranged on respectively in the through hole of shell (2) and pole shoe formation, and pipeline opening is alignd with utmost point tooth.
4. the pumping circulating cooling type magnetic fluid seal device of wriggling according to claim 1, is characterized in that:
In magnetic fluid seal device outside, peristaltic pump and cooling system are housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410384157.9A CN104197024B (en) | 2014-08-06 | 2014-08-06 | Peristaltic pumping circulation cooling type magnetic liquid sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410384157.9A CN104197024B (en) | 2014-08-06 | 2014-08-06 | Peristaltic pumping circulation cooling type magnetic liquid sealing device |
Publications (2)
| Publication Number | Publication Date |
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| CN104197024A true CN104197024A (en) | 2014-12-10 |
| CN104197024B CN104197024B (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410384157.9A Expired - Fee Related CN104197024B (en) | 2014-08-06 | 2014-08-06 | Peristaltic pumping circulation cooling type magnetic liquid sealing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500751A (en) * | 2014-12-12 | 2015-04-08 | 北京交通大学 | High temperature-resisting magnetic liquid sealing device |
| CN106195278A (en) * | 2016-08-30 | 2016-12-07 | 自贡兆强环保科技股份有限公司 | A kind of high speed cold blower fan magnetic fluid seal device |
| CN106969150A (en) * | 2017-03-31 | 2017-07-21 | 北京交通大学 | Pole shoe back-trough formula circulating cooling magnetic fluid seal device |
| CN112431926A (en) * | 2020-11-23 | 2021-03-02 | 清华大学 | Magnetic liquid sealing device |
| CN113757384A (en) * | 2021-09-07 | 2021-12-07 | 北京交通大学 | Magnetic fluid sealing device with axial through hole structure magnetic source |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402399A (en) * | 2016-10-25 | 2017-02-15 | 北京交通大学 | Magnetic liquid sealing device capable of reducing magnetic liquid evaporation |
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| JPS6272966A (en) * | 1985-09-25 | 1987-04-03 | Hitachi Ltd | Magnetic fluid seal device |
| JPH05302676A (en) * | 1992-04-27 | 1993-11-16 | Toshiba Corp | Shaft sealing device for vertical rotary machine |
| JP2000205417A (en) * | 1999-01-11 | 2000-07-25 | Ntn Corp | Magnetic fluid seal and vacuum spindle device using the same |
| CN101981360A (en) * | 2008-03-28 | 2011-02-23 | 伊格尔工业股份有限公司 | Rotary joint |
| CN202091518U (en) * | 2011-05-09 | 2011-12-28 | 埃慕迪磁电科技(上海)有限公司 | Water cooling structure of magnetic fluid sealing device |
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2014
- 2014-08-06 CN CN201410384157.9A patent/CN104197024B/en not_active Expired - Fee Related
Patent Citations (6)
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|---|---|---|---|---|
| US4592557A (en) * | 1985-02-07 | 1986-06-03 | Iversen Arthur H | Liquid cooled rotating seals |
| JPS6272966A (en) * | 1985-09-25 | 1987-04-03 | Hitachi Ltd | Magnetic fluid seal device |
| JPH05302676A (en) * | 1992-04-27 | 1993-11-16 | Toshiba Corp | Shaft sealing device for vertical rotary machine |
| JP2000205417A (en) * | 1999-01-11 | 2000-07-25 | Ntn Corp | Magnetic fluid seal and vacuum spindle device using the same |
| CN101981360A (en) * | 2008-03-28 | 2011-02-23 | 伊格尔工业股份有限公司 | Rotary joint |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500751A (en) * | 2014-12-12 | 2015-04-08 | 北京交通大学 | High temperature-resisting magnetic liquid sealing device |
| CN106195278A (en) * | 2016-08-30 | 2016-12-07 | 自贡兆强环保科技股份有限公司 | A kind of high speed cold blower fan magnetic fluid seal device |
| CN106195278B (en) * | 2016-08-30 | 2017-11-28 | 自贡兆强环保科技股份有限公司 | A kind of high speed air-cooler magnetic fluid seal device |
| CN106969150A (en) * | 2017-03-31 | 2017-07-21 | 北京交通大学 | Pole shoe back-trough formula circulating cooling magnetic fluid seal device |
| CN112431926A (en) * | 2020-11-23 | 2021-03-02 | 清华大学 | Magnetic liquid sealing device |
| CN112431926B (en) * | 2020-11-23 | 2022-03-25 | 清华大学 | Magnetic liquid sealing device |
| CN113757384A (en) * | 2021-09-07 | 2021-12-07 | 北京交通大学 | Magnetic fluid sealing device with axial through hole structure magnetic source |
| CN113757384B (en) * | 2021-09-07 | 2022-05-27 | 北京交通大学 | Magnetic fluid sealing device with axial through hole structure magnetic source |
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| CN104197024B (en) | 2015-06-10 |
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